1 /* audit -- definition of audit_context structure and supporting types
3 * Copyright 2003-2004 Red Hat, Inc.
4 * Copyright 2005 Hewlett-Packard Development Company, L.P.
5 * Copyright 2005 IBM Corporation
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/audit.h>
24 #include <linux/skbuff.h>
25 #include <uapi/linux/mqueue.h>
27 /* AUDIT_NAMES is the number of slots we reserve in the audit_context
28 * for saving names from getname(). If we get more names we will allocate
29 * a name dynamically and also add those to the list anchored by names_list. */
32 /* At task start time, the audit_state is set in the audit_context using
33 a per-task filter. At syscall entry, the audit_state is augmented by
34 the syscall filter. */
36 AUDIT_DISABLED, /* Do not create per-task audit_context.
37 * No syscall-specific audit records can
39 AUDIT_BUILD_CONTEXT, /* Create the per-task audit_context,
40 * and fill it in at syscall
41 * entry time. This makes a full
42 * syscall record available if some
43 * other part of the kernel decides it
44 * should be recorded. */
45 AUDIT_RECORD_CONTEXT /* Create the per-task audit_context,
46 * always fill it in at syscall entry
47 * time, and always write out the audit
48 * record at syscall exit time. */
57 struct list_head list;
59 struct audit_krule rule;
62 struct audit_cap_data {
63 kernel_cap_t permitted;
64 kernel_cap_t inheritable;
66 unsigned int fE; /* effective bit of file cap */
67 kernel_cap_t effective; /* effective set of process */
71 /* When fs/namei.c:getname() is called, we store the pointer in name and bump
72 * the refcnt in the associated filename struct.
74 * Further, in fs/namei.c:path_lookup() we store the inode and device.
77 struct list_head list; /* audit_context->names_list */
79 struct filename *name;
80 int name_len; /* number of chars to log */
81 bool hidden; /* don't log this record */
90 struct audit_cap_data fcap;
91 unsigned int fcap_ver;
92 unsigned char type; /* record type */
94 * This was an allocated audit_names and not from the array of
95 * names allocated in the task audit context. Thus this name
96 * should be freed on syscall exit.
101 struct audit_proctitle {
102 int len; /* length of the cmdline field. */
103 char *value; /* the cmdline field */
106 /* The per-task audit context. */
107 struct audit_context {
108 int dummy; /* must be the first element */
109 int in_syscall; /* 1 if task is in a syscall */
110 enum audit_state state, current_state;
111 unsigned int serial; /* serial number for record */
112 int major; /* syscall number */
113 struct timespec ctime; /* time of syscall entry */
114 unsigned long argv[4]; /* syscall arguments */
115 long return_code;/* syscall return code */
117 int return_valid; /* return code is valid */
119 * The names_list is the list of all audit_names collected during this
120 * syscall. The first AUDIT_NAMES entries in the names_list will
121 * actually be from the preallocated_names array for performance
122 * reasons. Except during allocation they should never be referenced
123 * through the preallocated_names array and should only be found/used
124 * by running the names_list.
126 struct audit_names preallocated_names[AUDIT_NAMES];
127 int name_count; /* total records in names_list */
128 struct list_head names_list; /* struct audit_names->list anchor */
129 char *filterkey; /* key for rule that triggered record */
131 struct audit_aux_data *aux;
132 struct audit_aux_data *aux_pids;
133 struct sockaddr_storage *sockaddr;
135 /* Save things to print about task_struct */
137 kuid_t uid, euid, suid, fsuid;
138 kgid_t gid, egid, sgid, fsgid;
139 unsigned long personality;
145 unsigned int target_sessionid;
147 char target_comm[TASK_COMM_LEN];
149 struct audit_tree_refs *trees, *first_trees;
150 struct list_head killed_trees;
168 unsigned long qbytes;
172 struct mq_attr mqstat;
181 unsigned int msg_prio;
182 struct timespec abs_timeout;
191 struct audit_cap_data cap;
202 struct audit_proctitle proctitle;
205 extern u32 audit_ever_enabled;
207 extern void audit_copy_inode(struct audit_names *name,
208 const struct dentry *dentry,
209 const struct inode *inode);
210 extern void audit_log_cap(struct audit_buffer *ab, char *prefix,
212 extern void audit_log_name(struct audit_context *context,
213 struct audit_names *n, struct path *path,
214 int record_num, int *call_panic);
216 extern int audit_pid;
218 #define AUDIT_INODE_BUCKETS 32
219 extern struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS];
221 static inline int audit_hash_ino(u32 ino)
223 return (ino & (AUDIT_INODE_BUCKETS-1));
226 /* Indicates that audit should log the full pathname. */
227 #define AUDIT_NAME_FULL -1
229 extern int audit_match_class(int class, unsigned syscall);
230 extern int audit_comparator(const u32 left, const u32 op, const u32 right);
231 extern int audit_uid_comparator(kuid_t left, u32 op, kuid_t right);
232 extern int audit_gid_comparator(kgid_t left, u32 op, kgid_t right);
233 extern int parent_len(const char *path);
234 extern int audit_compare_dname_path(const char *dname, const char *path, int plen);
235 extern struct sk_buff *audit_make_reply(__u32 portid, int seq, int type,
237 const void *payload, int size);
238 extern void audit_panic(const char *message);
240 struct audit_netlink_list {
243 struct sk_buff_head q;
246 int audit_send_list(void *);
252 extern int selinux_audit_rule_update(void);
254 extern struct mutex audit_filter_mutex;
255 extern void audit_free_rule_rcu(struct rcu_head *);
256 extern struct list_head audit_filter_list[];
258 extern struct audit_entry *audit_dupe_rule(struct audit_krule *old);
260 /* audit watch functions */
261 #ifdef CONFIG_AUDIT_WATCH
262 extern void audit_put_watch(struct audit_watch *watch);
263 extern void audit_get_watch(struct audit_watch *watch);
264 extern int audit_to_watch(struct audit_krule *krule, char *path, int len, u32 op);
265 extern int audit_add_watch(struct audit_krule *krule, struct list_head **list);
266 extern void audit_remove_watch_rule(struct audit_krule *krule);
267 extern char *audit_watch_path(struct audit_watch *watch);
268 extern int audit_watch_compare(struct audit_watch *watch, unsigned long ino, dev_t dev);
270 #define audit_put_watch(w) {}
271 #define audit_get_watch(w) {}
272 #define audit_to_watch(k, p, l, o) (-EINVAL)
273 #define audit_add_watch(k, l) (-EINVAL)
274 #define audit_remove_watch_rule(k) BUG()
275 #define audit_watch_path(w) ""
276 #define audit_watch_compare(w, i, d) 0
278 #endif /* CONFIG_AUDIT_WATCH */
280 #ifdef CONFIG_AUDIT_TREE
281 extern struct audit_chunk *audit_tree_lookup(const struct inode *);
282 extern void audit_put_chunk(struct audit_chunk *);
283 extern int audit_tree_match(struct audit_chunk *, struct audit_tree *);
284 extern int audit_make_tree(struct audit_krule *, char *, u32);
285 extern int audit_add_tree_rule(struct audit_krule *);
286 extern int audit_remove_tree_rule(struct audit_krule *);
287 extern void audit_trim_trees(void);
288 extern int audit_tag_tree(char *old, char *new);
289 extern const char *audit_tree_path(struct audit_tree *);
290 extern void audit_put_tree(struct audit_tree *);
291 extern void audit_kill_trees(struct list_head *);
293 #define audit_remove_tree_rule(rule) BUG()
294 #define audit_add_tree_rule(rule) -EINVAL
295 #define audit_make_tree(rule, str, op) -EINVAL
296 #define audit_trim_trees() (void)0
297 #define audit_put_tree(tree) (void)0
298 #define audit_tag_tree(old, new) -EINVAL
299 #define audit_tree_path(rule) "" /* never called */
300 #define audit_kill_trees(list) BUG()
303 extern char *audit_unpack_string(void **, size_t *, size_t);
305 extern pid_t audit_sig_pid;
306 extern kuid_t audit_sig_uid;
307 extern u32 audit_sig_sid;
309 #ifdef CONFIG_AUDITSYSCALL
310 extern int __audit_signal_info(int sig, struct task_struct *t);
311 static inline int audit_signal_info(int sig, struct task_struct *t)
313 if (unlikely((audit_pid && t->tgid == audit_pid) ||
314 (audit_signals && !audit_dummy_context())))
315 return __audit_signal_info(sig, t);
318 extern void audit_filter_inodes(struct task_struct *, struct audit_context *);
319 extern struct list_head *audit_killed_trees(void);
321 #define audit_signal_info(s,t) AUDIT_DISABLED
322 #define audit_filter_inodes(t,c) AUDIT_DISABLED
325 extern struct mutex audit_cmd_mutex;